Milled submicron organic biocides with narrow particle size distribution, and uses thereof

a biocide and submicron technology, applied in the field of producing submicron-sized organic biocides, can solve the problems of posing a health hazard, limiting the use efficiency of organic pesticides, and limiting the application of organic pesticides
US20060086841A1Active Publication Date: 2006-04-27KOPPERS PERFORMANCE CHEM
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
KOPPERS PERFORMANCE CHEM
Publication Date
2006-04-27

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Abstract

A method of milling substantially insoluble solid organic biocides to form a micron or sub-micron product having a narrow particle size distribution is presented. The milling involves wet milling of the organic biocide with high density milling media having a diameter between 0.1 mm and 0.8 mm, preferably between 0.2 mm and 0.7 mm, and a density equal to or greater than 3.8 g / cc, preferably greater than 5.5 g / cc, in a ball mill using between about 40% and 80% loading of the mill volume with milling media, and having the organic biocide suspended in an aqueous milling liquid which comprises one or more surface active agents. The milling speed is preferably high, for example from about 1000 rpm to about 4000 rpm. The milled product can be used in foliar applications at a lower effective dosage than prior art formulations, can be used in improved antifouling paint formulations, and can be used in new applications such as the direct injection of solid organic biocide particulates in wood to act as a long lasting wood preservative.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to co-pending U.S. patent application Ser. No. 10 / 868,967 filed Jun. 17, 2004, and to U.S. Provisional Application titled: MILLED SUBMICRON CHLOROTHALONIL WITH NARROW PARTICLE SIZE DISTRIBUTION, AND USES THEREOF, filed on Oct. 8, 2004.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

[0002] Not applicable INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC

[0003] Not applicable SEQUENCE LISTING

[0004] Not applicable FIELD OF THE INVENTION

[0005] The present invention relates to a method of producing submicron-sized organic biocide particles, methods of packaging same, and uses thereof. More particularly, the invention relates to use of high density milling media having a diameter between 0.1 and 0.8 mm to provide unexpected particle size reduction and narrow particle size distribution even for organic biocides known to be difficult to mill. This milled organic biocidal produc...

Claims

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